North University of China

Yongqiu Zheng

Pinggang Jia

Chenyang Xue

Xinyu Zhao

Liyun Wu

Jiandong Bai

Wenlong Wei

Chen Chen

Xiaoyu Gao

Jiamin Chen

Ruizhi Wang

Juan Cui

Jinge Guan

Yuan Han

Xiaolong Yan

The present disclosure relates to the technical field of solid engine burning rate test, and provides a method and system for measuring the burning rate of a propellant based on multi-channel ultrasonic waves. The method includes the following steps: collecting echo signals and corresponding noise signals of each ultrasonic channel, and pre-processing same; and finding a period of two adjacent echoes with the maximum amplitude difference, and the maximum peak of an echo period of current frame. In the present disclosure, the accuracy of echo moment is improved, and the burning rate is accurately measured under high noise environment.

Method and system for measuring burning rate of propellant based on multi-channel ultrasonic waves

The invention relates to the field of sensing technology, and discloses a double-parameter in-situ sensor based on waveguide grating, a sensing system and a preparation method. The sensor comprises an optical waveguide substrate, wherein a first straight optical waveguide and a second straight optical waveguide are arranged in the optical waveguide substrate in parallel, two ends of first straight optical waveguide are respectively connected with a first transmission fiber and a second transmission fiber, two ends of second straight optical waveguide are respectively connected with a third transmission fiber and a fourth transmission fiber, a first Bragg grating is arranged on the first straight optical waveguide, a second Bragg grating and a third Bragg grating are separately arranged on the second straight optical waveguide, a micro air groove is arranged on the upper surface of optical waveguide substrate, positioned between the second Bragg grating and the third Bragg grating.

Double-parameter in-situ sensor based on waveguide grating, a sensing system and a preparation method

The present disclosure relates to a thermal-acoustic-vibration three-parameter integrated in-situ sensor and system with a high-temperature-resistant and high-pressure-resistant structure. The provided thermal-acoustic-vibration three-parameter integrated in-situ sensor with a high-temperature-resistant and high-pressure-resistant structure comprises a heat detection device, a sound detection device and a vibration detection device; and the sound detection device and the vibration detection device are distributed on two sides of the heat detection device. When heat, sound and vibration need to be detected, only spectra of light signals emitted by the heat detection device, the sound detection device and the vibration detection device need to be obtained, and heat information, sound information and vibration information to be detected are obtained through the corresponding relation between the spectra of the optical signals emitted by the heat detection device, the sound detection device and the vibration detection device and heat information, sound information and vibration information to be detected.

Heat-sound-vibration three-parameter integrated in-situ sensor and system of high-temperature-resistant and high-pressure-resistant structure

Growing community of inventors

Shanxi, China

Yongqiu Zheng